Filter cartridge package



p 1949- -c. J ROHLAND FILTER CARTRIDGE PACKAGE 2 sheets-sheet 1 Filed 001;. 7 1944 Patented Apr. 12, 1949 UNITED FILTER CARTRIDGE PACKAGE Curt J. Rohland, Seekonk, Mara, assignor to Fram Corporation, a oorporationi-ofilthode' Island Application October '1, 1944, Serial No. 551,705

This invention relates to a filter cartridge,

more particularly to the storing and shipping of a filter cartridge.

A replaceable filter cartridge of a soft resilient Substance such as waste, cotton fibers, or the like, is retained in assembled relation by a knitted fabric sock. A cartridge of this type is forced into a casing and expands against the walls of the casingby reason of the compression of the cartridge as forced into such position. It is found that in making up such replaceable cartridges the manner of formation leaves the generally cylindrical outer surfaces of, the cartridges rather rough and irregular- It is further found that if such cartridges in a knitted sock type of cover are permitted to lie idle while being stored prior to being used the cartridges enlarge in size or diameter substantially, and to such an extent that it becomes exceedingly diflicult to position a cartridge of this type into a filter casing and under some circumstances it appears that the cartridge is altogether too large to be inserted into the casing. Rigid cartridges or cartridges having a cylindrical rigid wall may be used but are not comparable because of expense.

'One of the objects of this invention is to provide some means to prevent the expansion or increased diameter of a soft compressible filter cartridge which is of the type packed with waste or cotton fibers and which has a knitted sock over the same to hold cotton waste or the like in assembled position.

Another object of this invention is to provide a shipping package for the cartridge which package is utilized for preventing expansion of the cartridge while in storage.

Another object of this invention is to provide a package from which the cartridge may be extruded directly into the filter casing, the package serving as a means for assisting in placing the cartridge in the casing.

Another object of this invention is to provide a means for aligning the cartridge with the casing prior to forcing the same into position which assists in preventing a central tube which is usually present in thecasing from injuring the interior of the cartridge.

Another object of this invention is to provide a package which may be reduced inaxial length where limited space is required so asfto permit the cartridge being inserted into a casing and obtain the benefit of the package even though the" space is limited.

Another object of'the invention is to provide abutment means'from the tubular package which 7 Claims. (oi. MiG-56) will limit movement of'the outer shell while permitting the cartridge within to be forced therefrom into the casing. 7

With these and other objects in view, the in-' vention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a perspective view of the package which is the subject of this invention, in position for forcing the cartridge therefrom into the filter casing;

Fig. 2 is a sectional view of the outer container,-

and illustrating the cartridge within as entering the filter casing;

Fig. 3 is a, sectional view of the package of modified construction and the-casing into which the filter cartridge is designed to be positioned: Fig. 4 is an elevational view of the modified package;

Fig. 5 is a section thereof with the cartridge portion of the package torn away.

In proceeding with this invention after the soft cartridge is provided with the knitted sock forretaining the waste material or the like in assembled relation, the cartridge is placed within a tubular shell which will snugly receive the same and which serves to iron out irregularities in the outer surface of the cartridge and also serves to prevent expansion of the cartridge while being stored prior to'use. The tubular shell is equipped with covers at either end that it may serve as a shipping container. It is also so constituted as to be inserted into the casing and serve to align the cartridge axially with the casing that movement of the cartridge into the casing may be permitted. An abutment may be formed upon the outer surface of the shell so that it will be limited in its insertion into the upper end of a filter casing and while both end covers are off of the shell the cartridge may be forced from the ing and also obtain the other values of the package.

With reference to the drawing, the cartridge edge of the casing.

designated generally it and a perforated center tube I 2 which may be made of any rigid or semi-rigid material such as metal, cardboard, or plastic. About this center place. The sock or containing skin I4 is stretched over the base II and drawn into the tube I2 as at hasabase H (seeFig.5).

II where it is retained by a rigid or semi-rigid collar I I which is forced into the center tube I! with the edge Portion of the sock-like material I! bound between the collar and the tube i 2. The upper portion of this knitted sock is stretched inwardly over the upper end of the waste material which becomes somewhat rounded and a tubular collar issi-milarly forced into the upper end of the tube I! to bind the knitted sock in position.

A cartridge of this formation is objectionable in that when formed its outer surface is rough and irregular. Further. if it stands upon a shelf loose or is stored loosely in a container the cartridge blooms. or enlarges to such an extent that in many instances it is difficult to insert it into a casing and in other cases it is impossible because of such enlargement to insert it into a casing which is to receive it.

The filter case which is designed to receive the cartridge which has just been described consists of a rigid cylindrical wall with a bulging bottom wall 2| and may have a center tube 22 extending upwardly therefrom perforated as at 23 and threaded as at 24 for the reception of a bolt for binding a cover in place upon the rolled edge 25 of the casing 20. A threaded end 26 of the center tube provides for a connection with a conduit 26' while a nipple 21 in the side wall of the casing threaded as at 28 also provides for connection with a conduit 21' that circulation of fluid may be had into one conduit and out of the other of the engine 39.

In order to retain the cartridge against enlargement and also to assist in smoothing out the outer surface of the cartridge after formed, I insert the cartridge designated generally ill, into a cylindrical tube 39 which may be of any suitable material such for example as cardboard or a plastic, the diameter of which is substantially the same as the inner surface of the casing 2b and such as to slightly compress the cartridge. This cylindrical tube is open at both ends and may have a top cover 3| positioned thereon and a bottom cover 32 positioned at the other end, both in telescopic relation by reason of flanges 33 and 34, so as to provide a package for shipment of the cartridge from one place to another. Advertising material and printed directions for use of the cartridge may be printed on the outer surface of this cylindrical container.

The lower end of the tubular container is curved inwardly as at 38 so as to slightly enter the ,upper edge of the casing 20 as shown in Fig. 2, with the curved portion resting upon the upper A ring 42 about the container adjacent the inwardly curved portion 38 may also serve as an abutment to engage the upper edge of the casing 20. Pressure upon the top of the cartridge as shown in Fig. 1 will serve to force the cartridge through the tube 30 and 4 into the casing 20. The cartridge will be compressed as at 43 (see Fig. 2) as it is forced past the inwardly projecting edge ll but will at once expand toengage the inner surface of the casing and press tightly thereagainst.

The lower edge of the tubular cartridge container Ill may be provided with weakened portions 38 and 38 running tothe edge of the tube as shown in Fig". 4 which by simple manipulation of the fingers may be forced outwardly providing flanges or abutments I! in a sumcient number so as, to rest against the upper rolled edge of the casing while the remaining portion may extend inwardly, These abutments or fingers 31 are protected by the flange 34 of the cover 32 during shipment but when the cover is removed they are exposed so that they may be easily lifted from the position in the circular surface of the tubular wall 20 to the outwardly extended position as shown in Fig. 3. V

When it is desired to insert the cartridge into the'casing 20 it is merely necessary to cause these flanges, fingers or abutments to engage the edge 25, remove the top cover as shown in Fig. 3, and thence with the hand force the cartridge into the casing so that the center tube 22 extends into the much larger tube I2 and the cartridge moves to a position to seat on the shoulder 29 of the casing provided by the bottom wall. By positioning the tube 30 as shown in Fig. 3 the tube forms a directing guide for inserting the cartridge in position.

In some instances the tube 30 may be somewhat taller than the space above the casing which is to receive the cartridge and for such conditions I perforate the tubelll, as at 40 at a distance spaced from its upper end and axially at ll, that this end of the tube may be torn ofi to expose the cartridge as shown in Fig. 6, thus permitting this tube or package assembly to be positioned in a space which is more restricted but still sufficient to permit the cartridge without the container to be inserted in place.

A handle .5 of wire or some flexible material may be attached to the base of the cartridge to extend from one point on the base up over the top and down to the base at a diametrically opposite point in order to provide a hand grip for withdrawal of the cartridge from the casing.

I claim:

1. A filter cartridge package comprising a tu bular sleeve and a filter cartridge of the sock type which is housed within said sleeve in frictional engagement with the inner surface thereof and which may be manually forced axially out of the sleeve into a filter casing, said cartridge comprising a containing skin with a soft expandible fillin within said skin, the cartridge being held against diametrical expansion by said sleeve.

. 2. A filter cartridge package as in claim 1 wherein said soft expandible material is of a hydroscopic character.

3. A filter cartridge package as in claim 1 wherein said soft expandible material is cotton waste.

4. A filter cartridge package as in claim 1 wherein said sleeve is of carboard.

5. A filter cartridge package as in claim 1 wherein the sleeve is provided with an abutment adjacent one end thereof adapted to engage an end of the filter casing.

6. A filter cartridge package as in claim 1 wherein the sleeve is provided with fingers foldable from the sleeve to provide an abutment ad- 5.40am I jecent one end thereof adapted to engage on Number end of the filter casing. Y 7 1,646,264 7. A filter cartridge package as in claim 1 1,733,610- wherein the sleeve is provided with a weakened 1,884,155 end portion whereby it may be removed easily 5 2,057,122 from the sleeve. 2,138,874 CURT J. ROHLAND. 2,281,707 1 2,345,849 REFERENCES CITED I 2 357,572 The following references are of record in the 10 file of this patent:

. Number UNITED STATES PATENTS 232,019 Number Name Dita 1,602,543 Martin, Jr Oct. 12, 1926 18 Great Britain Apr. 16, 1925 

